liab lead. Cov hmoov lead-raws li cov xim (lead tetroxide/calcium plumbate, los yog "liab lead") tau dav siv los ua ib qho anti-corrosive primer txheej rau sab nrauv steelwork. Cov xim no tuaj yeem siv rau lub vaj lub rooj vag thiab cov railings, guttering thiab downpipes thiab lwm yam sab nraud hlau thiab steelwork.
Puas siv lead ua liab rau xim?
Red Lead yog lub ci liab rau txiv kab ntxwv, liab hmoov uas yog siv los ua Lead iav thiab xim liab; Cov xim ua los ntawm Cov Lead Liab yog nquag siv los tiv thaiv hlau thiab hlau los ntawm xeb. … Liab Lead kuj tseem siv tau los ua primer rau feem ntau ntawm cov txheej txheem hlau tsis sib xws ntawm cov tsev tsim nyob rau xyoo pua 20th.
Thaum twg cov xim txhuas siv tau?
Yav dhau los, cov xim hlau lead liab feem ntau yog siv rau ntawm cov kav dej sab nraud thiab cov hlau ua haujlwmua primer los tiv thaiv corrosion. Txawm hais tias tsis txwv los ntawm txoj cai lij choj, los ntawm 1992 nws feem ntau tau hloov los ntawm lwm yam xws li liab oxide.
Puas yog xim hlau lead ua kuab lom?
Vim muaj cov hmoov txhuas thiab chromium, cov xim muaj hlau lead (II) chromate yog tshuaj lom heev. Nws yog lub npe hu ua carcinogen, kev loj hlob toxicant thiab kev loj hlob toxicant. Ib qho lus dab neeg hais txog cov xim hlau lead yog qhov ua rau muaj kev lom ntau tshaj plaws yog noj cov xim pleev xim lead.
Dab tsi yog xim liab lead?
Nws yog cov hlau hnyav uas hnyav dua li cov khoom siv feem ntau. Lead yog mos thiab malleable, thiab kuj muaj ib tug kuj tsawg melting point. Thaum twgFreshly txiav, txhuas yog silvery nrog ib tug hint ntawm xiav; nws tarnishes rau xim grey dull thaum raug huab cua.
